For a bit more advanced example of scattering media, let's make a room with a window and a light source
illuminating from outside the room. The room contains scattering media, thus making the light beam coming through the
window visible.

As suggested previously, the scattering color and extinction values were adjusted until the image looked good. In
this kind of scene usually very small values are needed.

Note how the container box is quite smaller than the room itself. Container boxes should always be sized as
minimally as possible. If the box were as big as the room much higher values for samples would be needed
for a good result, thus resulting in a much slower rendering.